Add google-endpoints to third_party/.

third_party/google-endpoints/tkinter/filedialog.py

Index: third_party/google-endpoints/tkinter/filedialog.py
diff --git a/third_party/google-endpoints/tkinter/filedialog.py b/third_party/google-endpoints/tkinter/filedialog.py
new file mode 100644
index 0000000000000000000000000000000000000000..93a15388f1722e3da00af3985fae40f65be615e6
--- /dev/null
+++ b/third_party/google-endpoints/tkinter/filedialog.py
@@ -0,0 +1,17 @@
+from __future__ import absolute_import
+
+from future.utils import PY3
+
+if PY3:
+    from tkinter.filedialog import *
+else:
+    try:
+        from FileDialog import *
+    except ImportError:
+        raise ImportError('The FileDialog module is missing. Does your Py2 '
+                          'installation include tkinter?')
+    try:
+        from tkFileDialog import *
+    except ImportError:
+        raise ImportError('The tkFileDialog module is missing. Does your Py2 '
+                          'installation include tkinter?')